diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 11 | ||||
| -rw-r--r-- | include/linux/mm_types.h | 3 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index d6a2abc51e3d..d0f289bfef01 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -711,6 +711,14 @@ static inline void vma_assert_write_locked(struct vm_area_struct *vma) VM_BUG_ON_VMA(!__is_vma_write_locked(vma, &mm_lock_seq), vma); } +static inline void vma_mark_detached(struct vm_area_struct *vma, bool detached) +{ + /* When detaching vma should be write-locked */ + if (detached) + vma_assert_write_locked(vma); + vma->detached = detached; +} + #else /* CONFIG_PER_VMA_LOCK */ static inline void vma_init_lock(struct vm_area_struct *vma) {} @@ -721,6 +729,8 @@ static inline void vma_start_write(struct vm_area_struct *vma) {} static inline bool vma_try_start_write(struct vm_area_struct *vma) { return true; } static inline void vma_assert_write_locked(struct vm_area_struct *vma) {} +static inline void vma_mark_detached(struct vm_area_struct *vma, + bool detached) {} #endif /* CONFIG_PER_VMA_LOCK */ @@ -732,6 +742,7 @@ static inline void vma_init(struct vm_area_struct *vma, struct mm_struct *mm) vma->vm_mm = mm; vma->vm_ops = &dummy_vm_ops; INIT_LIST_HEAD(&vma->anon_vma_chain); + vma_mark_detached(vma, false); vma_init_lock(vma); } diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 843a45893991..3248ae45cb2e 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -506,6 +506,9 @@ struct vm_area_struct { #ifdef CONFIG_PER_VMA_LOCK int vm_lock_seq; struct rw_semaphore lock; + + /* Flag to indicate areas detached from the mm->mm_mt tree */ + bool detached; #endif /* |